以编程方式设置自定义 UITabBarItem?

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问题描述

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在 iOS 中，TabBarController 中的 TabBar 属性是只读的.如何将自定义项目与特定视图控制器相关联?如何访问 tabBar 内的 UITabBarItems?

In iOS, the TabBar property in the TabBarController is read only. How can I associate a custom item with a particular view controller? How do I access the UITabBarItems inside the tabBar?

像这样

CustomView *custom = [[CustomView alloc] init];
UITabBarItem *customTab = [[UITabBarItem alloc] initWithTitle:@"Custom" image:[UIImage imageNamed:@"custom.png"] tag:0];
SecondView *second = [[SecondView alloc] init];
UITabBarItem *secondTab = [[UITabBarItem alloc] initWithTitle:@"Next" image:[UIImage imageNamed:@"next.png"] tag:1];
NSArray *views = [NSArray arrayWithObjects:custom,second,nil];
[tabBarController setViewControllers:views];
//how do I set the individual TabBarItems (customTab,secondTab) to be associated
//with the views in question?  tabBarController.tabBar is read only

推荐答案

在每个视图控制器中，你可以设置一个 tabBarItem 属性.如果视图控制器归 UITabBarViewController 所有，则标签栏上的关联项将相应更新.

Inside each view controller, you can set a tabBarItem property. If the view controller is owned by a UITabBarViewController the associated item on the tab bar will be updated accordingly.

像这样

-(void)viewDidLoad {
    [super viewDidLoad];
    UITabBarItem *tbi = [[UITabBarItem alloc] initWithTitle:yourTitle image:yourIcon tag:yourTag];
    [self setTabBarItem:tbi]
    [tbi release];
}

很明显，您不限于在 viewDidLoad 方法中执行此操作.

You are not restricted to perform this operation in the viewDidLoad method, obviously.

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